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Deformation characterization of superplastic AA7475 alloy

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Abstract

AA7475 alloy was deformed up to 25% elongation in INSTRON at 788K. The grain boundary sliding due to this superplastic deformation was measured by Scanning Electron Microscope. The microstructure and texture development due to this deformation at elevated temperature was analyzed from the Orientation Image Microstructures i.e. the Electron Back Scattered Diffraction Image. The Orientation Image Microstructures revealed that superplastic deformation was associated with recovery and recrystallization in-situ process.

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Abbreviations

ɛ:

Strain

t:

Total

gbs:

Grain boundary sliding

d:

Diffusion

L:

Gauge length

w:

Width of Grain boundary sliding

m:

Meter (length scale)

μm:

Micrometer (length scale)

K:

Kelvin (Temperature)

ϕ:

Phi (Geometrical constant)

\( \bar L \) :

Mean linear intercept

°:

Degree (Misorientation Angle)

s:

Second (Time scale)

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Authors and Affiliations

  1. Material Science Department, Defence Institute of Advanced Technology, Pune, 411025, India

    P. Mukhopadhyay

  2. Materials Engineering Department, Indian Institute of Science, Bangalore, 560012, India

    S. Biswas & A. H. Chokshi

Authors
  1. P. Mukhopadhyay
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  2. S. Biswas
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  3. A. H. Chokshi
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Correspondence to P. Mukhopadhyay.

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Mukhopadhyay, P., Biswas, S. & Chokshi, A.H. Deformation characterization of superplastic AA7475 alloy. Trans Indian Inst Met 62, 149–152 (2009). https://doi.org/10.1007/s12666-009-0020-2

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  • DOI: https://doi.org/10.1007/s12666-009-0020-2

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